Fanning-mill.



No. 877,336. PATENTED JAN. 21, 1908. T. 0. HELGERSON.

FA'NNING MILL.

APPI JIOATIO-N FILED AUG. 31, 1905.

3 SHEET8SHEET l.

rug NoRnfis PETERS No. 877,336. PATENTED JAN. 21; 1908.

a T. 0 HELGERSON.

FANNINGMILL.

APPLICATION FILED AUG. 31, 1905 3 SHEETS-SHEET 2.

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No. 877,386. PATENTED JAN; 21, 1908.

T. 0. HELGERSON. Y

PANNING MILL.

-APPLIGATION FILED AUG. 31, 1905.

QWWAM,

'UNITED STATES PATENT OFFICE.

THOMAS O. HELGERSON, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR OF ONE-HALF TOFOSSTON MANUFACTURING 00., OF ST. PAUL, MINNESOTA, A CORPORATION OFMINNESOTA.

FANNING-MILL.

Specification of Letters Patent.

Patented Jan. 21, 1908.

Application filed August 31' 1905. Serial No. 2'76500.

To all whom it may concern:

Be it known that I, THOMAS O. HELGER- SON, a citizen of the UnitedStates, residing at Minneapolis, in the county of Hennepin and State ofMinnesota, have invented certain new and useful Improvements inFanning-Mills, of which the ollowing is a specification.

My invention relates to improvements in fanning mills designed forseparating different sizes of grain and removing dirt and chaff andconsists in the features of construction and combination hereinafterparticularly described and claimed.

In the accom anying drawings forming part of this spec cation, Figure 1is a side elevation of my improved fanning mill; Fig. 2 is a plan viewof the same; Fig. 3 is a section on line a:x of Fig. 2 Fig. 4 is adetail of a portion of the upper screen; Fig. 5 is a section on line y-yof Fig. 4; Fig. 6 is a section upon the same line at the other end ofthe screen; Fig. 7 is an enlarged section of one end of the machine online 213-21; of Fig. 2 Fig. 8 is a section on line o-o of Fig. 7 Figs. 9and 10 are details of adjusting mechanism for a feed pan used inconnection with the hopper; Fig. 11 is a top view of one end of thelower screen, and Fig. 12 is a section on zz of Fig. 3.

In the drawings 2 represents the standards of the frame. Supported bythe upper ends of the standards are side walls 3 between which isarranged a fixed hopper 4. Secured in the sides of the outlet end of thehopper are guide plates 5.

Arranged below the hopper and supported from the side walls 3 by straps6 is a screen supporting shoe 7. The straps 6 have pivotal support attheir opposite ends with the side walls and shoe. Supported by the rearend of the shoe underneath the outlet opening of the hopper is a pan 8.The pan as shown is carried by a cross piece 9 having pivotal support 10in the sides of the shoe, said cross piece carrying at one end an arm 11 which works in connection with the teeth of a rack 12 and is held inadjusted position by a spring 13. The arm 11 may thus be set to hold thepan at any desired tilted position as shown by dotted lines in Fig. 7 toregulate the outlet opening of the hopper. The pan as shown is providedwith upwardly extending side and rear walls. Within the shoe aresuitably supported a series of screen frames 14, 15, 16, 17 and 18. Eachof the screen frames 14, 15, 16 and 17 carries a pair of screens, theupper screen being secured in the upper faces of the front and rearcross bars of the screen frame, and the lower screen being supported inthe rear cross bar of the frame, the forward end of the screen extendingdownwardly away from the upper screen and being loosely supported uponrods 19. A space is thus left between the front end of the lower screenand the front cross bar of the frame through which space the chaff andlarger grain will pass to the screen below. The lowermost screen frame18 is provided'with but a single screen.

In Fig. 4 is shown a view of the upper screen frame in which the upperscreen is shown with larger openings than the lower screen. Thedifferent screen frames may be provided as in Fig. 4 with screens ofdifferent openings or screens of the same size openings. Below the shoeis arranged a fan casing 22 inclosing a fan 23 mounted upon'a shaft 24.The outlet end 25 of the fan casing opens at the front end of the lowerscreen frame. The front end of the fan casing is provided with anopening 26 through which the smaller grain passes from the lower screen18 to a screen frame 27 suitably supported below the fan casing. Thescreen frame 27 is provided with a screen 28 of the form shown in Fig.11,. and slides upon a series of cross bars 29 which serve as scrapersfor the screen. The screen frame 27 is adapted to be reciprocated bymeans of a bar 30 connecting the forward end of the frame with one endof a crank 31 having pivotal support 32, said crank being connected atits other end with the end of a lever arm 33 connected with the fanshaft 24. The shoe is adapted to be reciprocated by means of a rod 34connecting the shoe with one end of a crank 35, the opposite end of thecrank being connected by a bar 36 with the fan shaft. The fan shaft haschain and sprocket connection 37 with a large sprocket wheel 38 providedwith an actuating handle 39.

In order to prevent the grain working back in the feed pan 8 I providethe flexible lining 40 connected with the rear wall of the hopper at its:upper end and at its lower end connected with theforward edge of thefeed pan, as shown in Fig. 7, the lining being loose enough to allowtilting movement of the pan.

In operation the grain is dropped into the hopper, the pan 8 beingtilted to the desired position to regulate the feed from the hopper theshoe will assist in separating the grain and chaff; As the machine isactuated the chaff will be blown by the fan from the front end of themachine and the smallest grain will pass through the opening 26 in thefan casing on to the lowermost screen 27. The remaining dirt and ohafldeposited upon the lower screen 28 will be scraped therefrom by means ofthe cross bars 29.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1.. A fanning mill comprising in combina tion a hopper, a shoe havingswing support below the same, a screen frame supported in said shoe,upper and lower screens carried by said frame, the upper screen beingsupported at both ends in the screen frame, and the lower screen beingsupported at its rear end in the frame with its forward end looselysupported .and directed away from the upper screen.

2. A fanning mill comprising a hopper, a shoe having swing support belowthe same, a plurality of screen frames supported in said shoe, and upperand lower screens carried by each of said frames, the upper screensbeing supported at both ends in said frames, and the lower screens beingsupported at their rear ends, in said frames, the forward ends of e thesaid screens being loosely supported and directed downward away from theupper screens. 4 '3. A fanning mill comprising in combination a hopper,a shoe having swing support below the same, a screen frame supported insaid shoe, a feed-pan pivotally supported by said shoe below the outletend of sa1d hopper, 5

said feed-pan having upwardly extending walls at both endsand along therear side of said he per and a flexible lining connected at one end withthe rear wall of the hopper and extending to a pointforward of the lowerend of the front wall of the hopper.

.4, A fanning mill comprising in combination a hopper, a shoe havingswing support below the same, a plurality of screen frames supported insaid shoe, a feed-pan carried by- 6 sa1d shoe in connection with theoutlet end of said hopper and a flexible valve arranged in the outletend of the hopper preventing the contents of the hopper passingrearwardly or from the opposite ends. 6

5. A fanning mill comprising in combination a hopper, a shoe havingswing support below the same, a plurality of screen frames supported insaid shoe, upper and lower screens carried by each of said frames, the 7lower screens being'directed away from theupper screens at their forwardends,,a feedpan carried by said shoe inconnection with the outlet end ofsaid hopper, and a flexible lining connected atits upper end to the rear7 wall of the hop er and extending to a point forward of the ower end ofthe front wall of the hopper.

In testimony whereof I aflix my signature in presence of 'two witnesses.

THOMAS O. HELGERSON. Witnesses:

HQS. JOHNSON, -EMILY F. OTIS.

